Grinding-machine.



G. KiI'NDIG.

GRINDING MACHINE.

APPLICATION FILED APILS, 1911.

1,032,686. Patented July 16, 1912.

2 SHEETSSHEET 1.

22 44 75 if "y;

G. KiI'NmG.

GRINDING MACHINE.

APPLICATION FILED APR. 6, 1911.

Patented July 16, 1912.

2 SHEETS-SHEET 2.

- ()FFICE;

e'o'MLIEB KUNDIG, or simian NEABHERZOGENBUCHSEE, swImzERL-Ami 1 eammivemacnmn;

themes".

Be it known that I, Go'rrLiEB' IifiSDIGiil citizen of the Swiss Confederation, and re. siding ath iederonz, near Herzogenbuchsee," .Switzerhindj have invented certain new and "useful Improvements in Grinding-Machines, "of which thefollowing is a SPQClfiCtltlOIl My invention relates to grinding machines, and a primaryobject is to provide an improved grinding machine comprising an automatic device which not only regulates the position of the grinding table or bench relatively to the grindstone, but'enables the distance between the table or bench and the axis"; of the grindstone to be diminished" exactly prtiportionalto the wear of the grind;-

I i-attain these ends by feeding'the device "more or less rapidly corresponding to the 20*.

hardness of the grindstone, for which purpose the grindstone is contacted by-at least one feeler which is connected in such manner with the aforesaid devicethat it is automat-I carrying tli gi'intlStOIlQ 9, a wor1n2 engaging a'worm wheel 3 faston the vertical shaft 4. i Fast oaths-Bottom endsof this shaftl is aF disk-i 5 carrying a radially displaceable pin"11.:tThis pin is connected by a l111l7 witha forked'lever 6 able to rock about a ."vertical shaft 19.

In this manner I arrange that, when the shaft 4c rotates, the lever 6 is reciprocated owing to the crank-like movement ofthe:pin 4:1. The bushing 8 carry "ingthe-grindstone 9, is non-revolubly, but

axiallydisplaceably connected by a key 12 with thejmain shaft 1. This bushing hasan annulargroove 10 in which the antifriction.

rollers 11, journaled on thelever (i-,:engage with afsuitable amount of; play. In this manner-I provide that, when the lever 6' is reciprocated, the bushing 8 and with "it the grindstone 9 are pushed axially to and-fro and in this manner the entire periphery of I Specification of Letters ratem. Patented July 16,1912.- Applicatioii filed April's, 1911. Serial No. 619,285, l i

the grind'stone 9 isuniformly used in well' known manner.

In order to provide that the grindstone.

shall. always project a constant distance be-' yond the surface of the table or bench which is integral with theframe i5 the fol-lowing arrangement is made. The feeler levers 12, two of whlch are shown 1n,the illustrative einbodlinent, are connected together on the one hand by a muff 13 ,non-revo-lubly, but

axiallydisplaceably connected by a key and groove with the axle l4. Thesefeeler levers 12 are located close to the flat sides of the grindstone 9. Themuff 13 has an annular groove 15 1n which a two-armed forked level- '16 engages.- This lever 16 =isconnected with M the reciprocating mechanism of the grindv .ston ,9'by a connecting rod 17 connected, if'l desired by means of'a unive'rsa'l joint, to a lever 18 fast on the shaft 19, so that the feel- 1 ers 12 are axially displaced on the axle 72;

the same manner as the grindstonefi :on shaft 1.- One end of the axle 14 is reduced and screw-threaded and attachedby means of a nut 20-.in the eye of a lever-2O which is fast on a revo-luble shaft -21. In the illustrative embodiment the other end of; the shaft 21 carries a lever '23 carrying a click- 22. This click engages in a ratchet wheel 25 which is loose on the shaft 21 and isintegral with thebevel gear 2% meshing with p a bevel gear 26 'faston' a shaft 27. This. shaft carries a'hand wheel 28 outside the frame 45, and within the latter a worm 29 meshing with a worm gear 30 fast 'on the shaft 31. This'shaft 31 carries, in addition,

a spurgear 32 meshing with a toothed rack 33'attached to the su-pport'A of the machine Q The lever 23 has an armfi t, to which is v attached the-one end ofa rope 35 running, I

over a pulley'.36, a weight 37 being carried ffi bythe other end ofthe rope. In the middle portion of the lever 20 is a set-screw 38 which abuts against the projection A4 of the table 43. Above thefeelers 12;,isithe pressure roller 10 for thework-piece depressed looby a weight 39. 1,, My improved machine operates as :fol-

-lo\vs:--The work-piece, 6.9. a file; is: fed by,

a horizontally. and vertically displacea holder to the ,grindstone 9 in suchman that the central axis of the. file'fcan be justediqjin" position relati ely to the st-onegin dependence on j t hape of Such a holder is well known to all skilled in this art, as is" also its arrangement just re- .essaryy 4 Whenassembling the machine'the feelers 12 are adjusted by the set-screw 38 with ferred to; therefore, it is. deemed that illustrationand further description areun-nectheir upper faces" at the same height as the crown of. the grindstone 9, and the weight 37 tends to keep them always in such a. position that the screw 38 contacts with the pro- I jection- 44.. As. soon as'the grindstone is worn somewhat the feelers '12 are lowered by.

the work-piece, the shaft .21 is simultaneously rotated an amount corresponding to.

the wearof the grindstone, and the table 43 and its projection 44 are. simultaneously lowereda. corresponding amount, so that afterthe termination of the feed motion the project-ion 44 and the screw 38 contact other. Thenewwork-piece which is introduced consequently finds the feelers 12 always at .the height'of the crown of the grindstone 9, because the table, on which the work-piece lies, together with feelers 12 is moved downward by the feed mechanism correspondingto thewear of the grindstone 9, as willnow be described. Namely, when the grindstone is, smal amount, the feelers 12,as stated, are

moved downward under the infiuenceof thework-piece. .The small rotatory motion of the shaft 2l is imparted to the click 22 gear 24 andlthe bevel gear 26.

which rotates the ratchet wheel 25 the bevel the spur gear 32 on'the shaft 31 rolls, owing to the-.wormigearing 29,,30, on" the rack 33 fastened on the'support A-and. -.moves the' J table-43- downward', As the entire feed mechanism is mounted onthe frame 45 it will descend; with the latter; sothat thede- 7 vers 12, 20 again arri-ve in .theirJor-iginal horizontal position relatively to the face 0f the'table, and the click 22 Iocks-backslid-in with its arm 23 over the ratchetwheeli- This operat-ion is repeated automatically un- .til the grindstone has become unusable and must be exchanged. As the table descend s exactly the, amount of the, wear of the' -grind stone, the feed motion is re-latively. irapidwhenthe grindstone 'is soft, andIrelatiVelyslow when the grindstone is hard. If'onlyone feeler lever be employed, itwilli move- 1n a groove provided in the vertical central plane of the grindstone. Such a; simple change fromthe embodiment illustrated-is: regarded as not involving invention thereover and'as not requiring illustration or further description for it tobe-understood .by all persons skilled. in this art.

If work-pieces are round whicharenarrower than the grin stone, the slide whichshifts the work-piece may be turned-at any desired angle relatively .to the axis of the} grindstone. Oneconsequence thereof will one anv worn away even a very- Con'sequently;

inds-tone axia y; ack." an tp th along;- feed mechanismmountedmthe frame for movingithe same' 'relatively to said supbe that the work-piece will always. contact with the two feelerlevers'. or with-the one single feeler lever. Also, the feelers 12 a1e hereby prevented from fiyingupward -.w l1en a piece has broken out of the grindstone, for example.

Instead of thegone ratchet wheel .25 two.

or more ratchet wheelsmay. be arranged one beside another in 1 known. manner having their teeth oppositely dir'ected. The idle motion. of the click .22 in the gaps" between the teeth is then reduced, because 'it, some times engages withjone and sometimes with another wheel. Also, frictiongear adapted. to feed the table cont-inl c'msly may-be employed. Feed mechanisms of the character just mentioned are old in the arts .andare recogn zed as well known mechanical equiv: alents for the. feed mechanism herein-illustrated' and hereinbefore described I therefore, further description and illustration are believed to be. unnecessary."

1 v Instead of thetable bein'g lowered 'corresponding to the wear of the grindstone,'t he height; of theaxle of. the grindstone-not be- ;ing varied, the arrangement. may be suchthat the position of the table is not changed butthe axle of the grind'stoneis 'moyed.t -o-,

ward the-table corresponding to the wear of the. grindstone, this being brought about 111 similar manner by --means offeelers These feelers-may be arrangedto rock as inthe illustrativeembodiment, oftheyunay be 'dis placealf le in guides parallel with them,- Obviously,it is possible to grindotherjworkl vpieces, such as surface plates and the'jlik'e,

with the above: described grinding machine. I'claim:'

spectto: said support grindstone; feed mechanism mounted in the. frame ior-f m;

in-g the same relatively-to said support and grindstone; and I a feeler which isj-op erativelyconnected with said feed mechanism and-ac .-.tuates thelatterto lower 'sa i'd frame as the gr ndstone wears away.-

.' .2.--I n a'grinding inzichine. .the-con bina-.

'tion with asupport-5 amain shaft journaledtherein; and ai grindstone nounted faston sa d shaft; and-"movable lengthwise thereof {of a frame formedwith a lo'ei-i'ch arranged-i'n operative ireljation ito i said grindstone; said .frame' be ingmovable with respect to said support {and grindstone reeiproca-tijng'mech;

anism driven bysaid shaft; for moYithere? portand.grindstone; and a feeler-wiihich is operatively connected-with said teed mechanism and aetuates-the latter to lower said frame automat cally as the grlndstone wears away.

3.111 a grinding machine, the combina--- tion with a support having a toothedmem-- her; a main shaft journaled in said support 5 1 and a grindstone mounted fast on said shaft and movable lengthw se thereof; of a frame formed with a bench arranged in operative relation to the grindstone; an aXle-journaledin said frame a'toothed wheel fast' on said axle and in meshwith said toothed member; a second shaft journaled in said frameand provided with a bevel gear and a worm; a worm wheel mounted on said axle and in mesh with said worm; a feed shaftjournaled in said frame; a loaded lever fast-on said feed shaft; a ratchet wheel loose on said feed shaft; a bevel gear mounted loose on the latter and connected with said ratchet wheel and in mesh with the first'named bevel gear; a click carried by said lever; a second lever fast on said feedshaft and provided with a stop adapted to contact with said bench in its normal position; and a the'grindstone -wears away.

feeler which is operatively connected with the last-named lever and which actuates the sarneto lower said frame automatically: as

L In a grinding machine, the combination with a support; a main shaft journaled therein; and a grinds-tone mounted. fast on said main shaft; of a frame having a bench arranged in operative relationto the grindstone; said frame being movable with respect 'to' said support and grindstone; feed mechanism mounted in the frame for moving the samefrelatively to said support and grindstone; a feel-er which is operatively' connected with said feed mechanism and actuates the latter to lower said frame as the grindstone wears away; and mechanism for moving said feeler back and forth across the grinding face of the grindstone.

In testimony whereof, 1 catfix inyysigna ture in the presence of twowvitnesses.

- GOTTLIEB-KUNDIQ: \Vitnesses FRIEDRICH NAUGALI', FRIEDR. Monme. 

